在C＃SOAP请求中使用WSDL时的System.NullReferenceException

Question

另一个类似但无法解决的问题在本文的同一篇文章中尝试了解决上述问题的答案，这是针对数组的。在这里它是查找和四尝试下面，但它仍然无法正常工作。 Iv也试过

createCustomerRequest.CustomerDetails.Title[0].Code[0] = cloneTitleCode[0]; 

所有的[0] iv切换它们并取消它们，并尝试所有的组合仍然无法正常工作。

//Security settings to match server using this line: - 
Dsoapui.https.protocols=SSLv3,TLSv1.2 ... 
BasicHttpsBinding httpsBinding = new 
BasicHttpsBinding(BasicHttpsSecurityMode.Transport); 

//Using the security settings to create the client which will let us send/recieve the requests... 
      CustomerServiceClient soapClient = new CustomerServiceClient("BasicHttpsBinding_ICustomerService"); 

      //Set credentials for the client... 
      soapClient.ClientCredentials.UserName.UserName = username; 
      soapClient.ClientCredentials.UserName.Password = password; 

      //Create instances of requesting and recieving data from the server for customerDetails... 
      CreateCustomer createCustomer = new CreateCustomer(); 
      CreateCustomerRequest createCustomerRequest = new CreateCustomerRequest(); 
      CreateCustomerResponse createCustomerResponse = new CreateCustomerResponse(); 

      //Set customer details request (so whatever will be included in the request to recieve the info)... 
      createCustomerRequest.UserName = username; 
      createCustomerRequest.Password = password; 
      createCustomerRequest.SystemToken = "2fa192c3-1215-41f9-be71-2ba6e279494e"; 

      //Get current time to generate unique customer number... 
      string currentTime = DateTime.Now.ToLongTimeString(); 
      string cleanTime = Regex.Replace(currentTime, "[^A-Za-z0-9 ]", ""); 

      //For WSDL arrays create the array and instance then use it like below... 
      createCustomerRequest.CustomerDetails.Title = new CustomerServiceWSDL.LookupItem(); 
      createCustomerRequest.CustomerDetails = new CreateCustomer(); 
      createCustomerRequest.CustomerDetails.CustomerNumber = "001" + cleanTime; 
      createCustomerRequest.CustomerDetails.FirstName = cloneFirstName; 
      createCustomerRequest.CustomerDetails.Surname = cloneSurName; 

      createCustomerRequest.CustomerDetails.Title.Code = cloneTitleCode; 

一切IM播放WSDL参考，在此代码：

  [System.Diagnostics.DebuggerStepThroughAttribute()] 
[System.CodeDom.Compiler.GeneratedCodeAttribute("System.Runtime.Serialization", "4.0.0.0")] 
[System.Runtime.Serialization.DataContractAttribute(Name="CreateCustomer", Namespace= + WEBAPI)] 
[System.SerializableAttribute()] 
public partial class CreateCustomer : object, System.Runtime.Serialization.IExtensibleDataObject, System.ComponentModel.INotifyPropertyChanged { 

    [System.NonSerializedAttribute()] 
    private System.Runtime.Serialization.ExtensionDataObject extensionDataField; 

    [System.Runtime.Serialization.OptionalFieldAttribute()] 
    private Account_Status.CustomerServiceWSDL.LookupItem BranchField; 

    [System.Runtime.Serialization.OptionalFieldAttribute()] 
    private Account_Status.CustomerServiceWSDL.LookupItem BusinessSourceField; 

    [System.Runtime.Serialization.OptionalFieldAttribute()] 
    private Account_Status.CustomerServiceWSDL.ContactInformation ContactDetailsField; 

    [System.Runtime.Serialization.OptionalFieldAttribute()] 
    private string CreatedByField; 

    [System.Runtime.Serialization.OptionalFieldAttribute()] 
    private System.Nullable<System.DateTime> CreationDateField; 

    [System.Runtime.Serialization.OptionalFieldAttribute()] 
    private System.Nullable<decimal> CreditLimitField; 

    [System.Runtime.Serialization.OptionalFieldAttribute()] 
    private Account_Status.CustomerServiceWSDL.Residence CurrentAddressField; 

    [System.Runtime.Serialization.OptionalFieldAttribute()] 
    private string CustomerNumberField; 

    [System.Runtime.Serialization.OptionalFieldAttribute()] 
    private System.DateTime DateOfBirthField; 

    [System.Runtime.Serialization.OptionalFieldAttribute()] 
    private Account_Status.CustomerServiceWSDL.LookupItem EmploymentStatusField; 

    [System.Runtime.Serialization.OptionalFieldAttribute()] 
    private string FirstNameField; 

    [System.Runtime.Serialization.OptionalFieldAttribute()] 
    private Account_Status.CustomerServiceWSDL.Gender GenderField; 

    [System.Runtime.Serialization.OptionalFieldAttribute()] 
    private string IdNumberField; 

    [System.Runtime.Serialization.OptionalFieldAttribute()] 
    private string InitialsField; 

    [System.Runtime.Serialization.OptionalFieldAttribute()] 
    private Account_Status.CustomerServiceWSDL.LookupItem MaritalStatusField; 

    [System.Runtime.Serialization.OptionalFieldAttribute()] 
    private string NationalInsuranceNumberField; 

    [System.Runtime.Serialization.OptionalFieldAttribute()] 
    private Account_Status.CustomerServiceWSDL.LookupItem NationalityField; 

    [System.Runtime.Serialization.OptionalFieldAttribute()] 
    private bool NoMailMarketingField; 

    [System.Runtime.Serialization.OptionalFieldAttribute()] 
    private System.Nullable<int> NoOfChildrenField; 

    [System.Runtime.Serialization.OptionalFieldAttribute()] 
    private bool NoThirdPartyMarketingField; 

    [System.Runtime.Serialization.OptionalFieldAttribute()] 
    private Account_Status.CustomerServiceWSDL.LookupItem OccupationField; 

    [System.Runtime.Serialization.OptionalFieldAttribute()] 
    private string PreviousNameField; 

    [System.Runtime.Serialization.OptionalFieldAttribute()] 
    private System.Nullable<System.DateTime> ReviewDateField; 

    [System.Runtime.Serialization.OptionalFieldAttribute()] 
    private Account_Status.CustomerServiceWSDL.LookupItem StatusField; 

    [System.Runtime.Serialization.OptionalFieldAttribute()] 
    private string SurnameField; 

    [System.Runtime.Serialization.OptionalFieldAttribute()] 
    private Account_Status.CustomerServiceWSDL.LookupItem TitleField; 

    [global::System.ComponentModel.BrowsableAttribute(false)] 
    public System.Runtime.Serialization.ExtensionDataObject ExtensionData { 
     get { 
      return this.extensionDataField; 
     } 
     set { 
      this.extensionDataField = value; 
     } 
    } 

    [System.Runtime.Serialization.DataMemberAttribute()] 
    public Account_Status.CustomerServiceWSDL.LookupItem Branch { 
     get { 
      return this.BranchField; 
     } 
     set { 
      if ((object.ReferenceEquals(this.BranchField, value) != true)) { 
       this.BranchField = value; 
       this.RaisePropertyChanged("Branch"); 
      } 
     } 
    } 

    [System.Runtime.Serialization.DataMemberAttribute()] 
    public Account_Status.CustomerServiceWSDL.LookupItem BusinessSource { 
     get { 
      return this.BusinessSourceField; 
     } 
     set { 
      if ((object.ReferenceEquals(this.BusinessSourceField, value) != true)) { 
       this.BusinessSourceField = value; 
       this.RaisePropertyChanged("BusinessSource"); 
      } 
     } 
    } 

    [System.Runtime.Serialization.DataMemberAttribute()] 
    public Account_Status.CustomerServiceWSDL.ContactInformation ContactDetails { 
     get { 
      return this.ContactDetailsField; 
     } 
     set { 
      if ((object.ReferenceEquals(this.ContactDetailsField, value) != true)) { 
       this.ContactDetailsField = value; 
       this.RaisePropertyChanged("ContactDetails"); 
      } 
     } 
    } 

    [System.Runtime.Serialization.DataMemberAttribute()] 
    public string CreatedBy { 
     get { 
      return this.CreatedByField; 
     } 
     set { 
      if ((object.ReferenceEquals(this.CreatedByField, value) != true)) { 
       this.CreatedByField = value; 
       this.RaisePropertyChanged("CreatedBy"); 
      } 
     } 
    } 

    [System.Runtime.Serialization.DataMemberAttribute()] 
    public System.Nullable<System.DateTime> CreationDate { 
     get { 
      return this.CreationDateField; 
     } 
     set { 
      if ((this.CreationDateField.Equals(value) != true)) { 
       this.CreationDateField = value; 
       this.RaisePropertyChanged("CreationDate"); 
      } 
     } 
    } 

    [System.Runtime.Serialization.DataMemberAttribute()] 
    public System.Nullable<decimal> CreditLimit { 
     get { 
      return this.CreditLimitField; 
     } 
     set { 
      if ((this.CreditLimitField.Equals(value) != true)) { 
       this.CreditLimitField = value; 
       this.RaisePropertyChanged("CreditLimit"); 
      } 
     } 
    } 

    [System.Runtime.Serialization.DataMemberAttribute()] 
    public Account_Status.CustomerServiceWSDL.Residence CurrentAddress { 
     get { 
      return this.CurrentAddressField; 
     } 
     set { 
      if ((object.ReferenceEquals(this.CurrentAddressField, value) != true)) { 
       this.CurrentAddressField = value; 
       this.RaisePropertyChanged("CurrentAddress"); 
      } 
     } 
    } 

    [System.Runtime.Serialization.DataMemberAttribute()] 
    public string CustomerNumber { 
     get { 
      return this.CustomerNumberField; 
     } 
     set { 
      if ((object.ReferenceEquals(this.CustomerNumberField, value) != true)) { 
       this.CustomerNumberField = value; 
       this.RaisePropertyChanged("CustomerNumber"); 
      } 
     } 
    } 

    [System.Runtime.Serialization.DataMemberAttribute()] 
    public System.DateTime DateOfBirth { 
     get { 
      return this.DateOfBirthField; 
     } 
     set { 
      if ((this.DateOfBirthField.Equals(value) != true)) { 
       this.DateOfBirthField = value; 
       this.RaisePropertyChanged("DateOfBirth"); 
      } 
     } 
    } 

    [System.Runtime.Serialization.DataMemberAttribute()] 
    public Account_Status.CustomerServiceWSDL.LookupItem EmploymentStatus { 
     get { 
      return this.EmploymentStatusField; 
     } 
     set { 
      if ((object.ReferenceEquals(this.EmploymentStatusField, value) != true)) { 
       this.EmploymentStatusField = value; 
       this.RaisePropertyChanged("EmploymentStatus"); 
      } 
     } 
    } 

    [System.Runtime.Serialization.DataMemberAttribute()] 
    public string FirstName { 
     get { 
      return this.FirstNameField; 
     } 
     set { 
      if ((object.ReferenceEquals(this.FirstNameField, value) != true)) { 
       this.FirstNameField = value; 
       this.RaisePropertyChanged("FirstName"); 
      } 
     } 
    } 

    [System.Runtime.Serialization.DataMemberAttribute()] 
    public string Surname 
    { 
     get 
     { 
      return this.SurnameField; 
     } 
     set 
     { 
      if ((object.ReferenceEquals(this.SurnameField, value) != true)) 
      { 
       this.SurnameField = value; 
       this.RaisePropertyChanged("Surname"); 
      } 
     } 
    } 

    [System.Runtime.Serialization.DataMemberAttribute()] 
    public Account_Status.CustomerServiceWSDL.Gender Gender { 
     get { 
      return this.GenderField; 
     } 
     set { 
      if ((this.GenderField.Equals(value) != true)) { 
       this.GenderField = value; 
       this.RaisePropertyChanged("Gender"); 
      } 
     } 
    } 

    [System.Runtime.Serialization.DataMemberAttribute()] 
    public string IdNumber { 
     get { 
      return this.IdNumberField; 
     } 
     set { 
      if ((object.ReferenceEquals(this.IdNumberField, value) != true)) { 
       this.IdNumberField = value; 
       this.RaisePropertyChanged("IdNumber"); 
      } 
     } 
    } 

    [System.Runtime.Serialization.DataMemberAttribute()] 
    public string Initials { 
     get { 
      return this.InitialsField; 
     } 
     set { 
      if ((object.ReferenceEquals(this.InitialsField, value) != true)) { 
       this.InitialsField = value; 
       this.RaisePropertyChanged("Initials"); 
      } 
     } 
    } 

    [System.Runtime.Serialization.DataMemberAttribute()] 
    public Account_Status.CustomerServiceWSDL.LookupItem MaritalStatus { 
     get { 
      return this.MaritalStatusField; 
     } 
     set { 
      if ((object.ReferenceEquals(this.MaritalStatusField, value) != true)) { 
       this.MaritalStatusField = value; 
       this.RaisePropertyChanged("MaritalStatus"); 
      } 
     } 
    } 

    [System.Runtime.Serialization.DataMemberAttribute()] 
    public string NationalInsuranceNumber { 
     get { 
      return this.NationalInsuranceNumberField; 
     } 
     set { 
      if ((object.ReferenceEquals(this.NationalInsuranceNumberField, value) != true)) { 
       this.NationalInsuranceNumberField = value; 
       this.RaisePropertyChanged("NationalInsuranceNumber"); 
      } 
     } 
    } 

    [System.Runtime.Serialization.DataMemberAttribute()] 
    public Account_Status.CustomerServiceWSDL.LookupItem Nationality { 
     get { 
      return this.NationalityField; 
     } 
     set { 
      if ((object.ReferenceEquals(this.NationalityField, value) != true)) { 
       this.NationalityField = value; 
       this.RaisePropertyChanged("Nationality"); 
      } 
     } 
    } 

    [System.Runtime.Serialization.DataMemberAttribute()] 
    public bool NoMailMarketing { 
     get { 
      return this.NoMailMarketingField; 
     } 
     set { 
      if ((this.NoMailMarketingField.Equals(value) != true)) { 
       this.NoMailMarketingField = value; 
       this.RaisePropertyChanged("NoMailMarketing"); 
      } 
     } 
    } 

    [System.Runtime.Serialization.DataMemberAttribute()] 
    public System.Nullable<int> NoOfChildren { 
     get { 
      return this.NoOfChildrenField; 
     } 
     set { 
      if ((this.NoOfChildrenField.Equals(value) != true)) { 
       this.NoOfChildrenField = value; 
       this.RaisePropertyChanged("NoOfChildren"); 
      } 
     } 
    } 

    [System.Runtime.Serialization.DataMemberAttribute()] 
    public bool NoThirdPartyMarketing { 
     get { 
      return this.NoThirdPartyMarketingField; 
     } 
     set { 
      if ((this.NoThirdPartyMarketingField.Equals(value) != true)) { 
       this.NoThirdPartyMarketingField = value; 
       this.RaisePropertyChanged("NoThirdPartyMarketing"); 
      } 
     } 
    } 

    [System.Runtime.Serialization.DataMemberAttribute()] 
    public Account_Status.CustomerServiceWSDL.LookupItem Occupation { 
     get { 
      return this.OccupationField; 
     } 
     set { 
      if ((object.ReferenceEquals(this.OccupationField, value) != true)) { 
       this.OccupationField = value; 
       this.RaisePropertyChanged("Occupation"); 
      } 
     } 
    } 

    [System.Runtime.Serialization.DataMemberAttribute()] 
    public string PreviousName { 
     get { 
      return this.PreviousNameField; 
     } 
     set { 
      if ((object.ReferenceEquals(this.PreviousNameField, value) != true)) { 
       this.PreviousNameField = value; 
       this.RaisePropertyChanged("PreviousName"); 
      } 
     } 
    } 

    [System.Runtime.Serialization.DataMemberAttribute()] 
    public System.Nullable<System.DateTime> ReviewDate { 
     get { 
      return this.ReviewDateField; 
     } 
     set { 
      if ((this.ReviewDateField.Equals(value) != true)) { 
       this.ReviewDateField = value; 
       this.RaisePropertyChanged("ReviewDate"); 
      } 
     } 
    } 

    [System.Runtime.Serialization.DataMemberAttribute()] 
    public Account_Status.CustomerServiceWSDL.LookupItem Status { 
     get { 
      return this.StatusField; 
     } 
     set { 
      if ((object.ReferenceEquals(this.StatusField, value) != true)) { 
       this.StatusField = value; 
       this.RaisePropertyChanged("Status"); 
      } 
     } 
    } 


    [System.Runtime.Serialization.DataMemberAttribute()] 
    public Account_Status.CustomerServiceWSDL.LookupItem Title { 
     get { 
      return this.TitleField; 
     } 
     set { 
      if ((object.ReferenceEquals(this.TitleField, value) != true)) { 
       this.TitleField = value; 
       this.RaisePropertyChanged("Title"); 
      } 
     } 
    } 

    public event System.ComponentModel.PropertyChangedEventHandler PropertyChanged; 

    protected void RaisePropertyChanged(string propertyName) { 
     System.ComponentModel.PropertyChangedEventHandler propertyChanged = this.PropertyChanged; 
     if ((propertyChanged != null)) { 
      propertyChanged(this, new System.ComponentModel.PropertyChangedEventArgs(propertyName)); 
     } 
    } 
} 


    [System.Diagnostics.DebuggerStepThroughAttribute()] 
[System.CodeDom.Compiler.GeneratedCodeAttribute("System.Runtime.Serialization", "4.0.0.0")] 
[System.Runtime.Serialization.DataContractAttribute(Name="LookupItem", Namespace= + APIWEB)] 
[System.SerializableAttribute()] 
public partial class LookupItem : object, System.Runtime.Serialization.IExtensibleDataObject, System.ComponentModel.INotifyPropertyChanged { 

    [System.NonSerializedAttribute()] 
    private System.Runtime.Serialization.ExtensionDataObject extensionDataField; 

    [System.Runtime.Serialization.OptionalFieldAttribute()] 
    private string CodeField; 

    [System.Runtime.Serialization.OptionalFieldAttribute()] 
    private string DisplayTextField; 

    [System.Runtime.Serialization.OptionalFieldAttribute()] 
    private bool IsActiveField; 

    [global::System.ComponentModel.BrowsableAttribute(false)] 
    public System.Runtime.Serialization.ExtensionDataObject ExtensionData { 
     get { 
      return this.extensionDataField; 
     } 
     set { 
      this.extensionDataField = value; 
     } 
    } 

    [System.Runtime.Serialization.DataMemberAttribute()] 
    public string Code { 
     get { 
      return this.CodeField; 
     } 
     set { 
      if ((object.ReferenceEquals(this.CodeField, value) != true)) { 
       this.CodeField = value; 
       this.RaisePropertyChanged("Code"); 
      } 
     } 
    } 

    [System.Runtime.Serialization.DataMemberAttribute()] 
    public string DisplayText { 
     get { 
      return this.DisplayTextField; 
     } 
     set { 
      if ((object.ReferenceEquals(this.DisplayTextField, value) != true)) { 
       this.DisplayTextField = value; 
       this.RaisePropertyChanged("DisplayText"); 
      } 
     } 
    } 

    [System.Runtime.Serialization.DataMemberAttribute()] 
    public bool IsActive { 
     get { 
      return this.IsActiveField; 
     } 
     set { 
      if ((this.IsActiveField.Equals(value) != true)) { 
       this.IsActiveField = value; 
       this.RaisePropertyChanged("IsActive"); 
      } 
     } 
    } 

    public event System.ComponentModel.PropertyChangedEventHandler PropertyChanged; 

    protected void RaisePropertyChanged(string propertyName) { 
     System.ComponentModel.PropertyChangedEventHandler propertyChanged = this.PropertyChanged; 
     if ((propertyChanged != null)) { 
      propertyChanged(this, new System.ComponentModel.PropertyChangedEventArgs(propertyName)); 
     } 
    } 
} 

Answer 1

这就是原因purchaseOnHoldSetRequest.AdditionalDetail是Array型（主要是，从您发布的代码），你还没有初始化，并试图设置在指数0说purchaseOnHoldSetRequest.AdditionalDetail[0].Description这将势必会抛出NullRefException

根据您的WSDL的项目，该财产是AdditionalDetails类的阵列所看到BEL流

[System.Runtime.Serialization.DataMemberAttribute()] 
public Account_Status.ServiceReference2.AdditionalDetail[] AdditionalDetail { 
    get { 
     return this.AdditionalDetailField; 
    } 
    set { 
     if ((object.ReferenceEquals(this.AdditionalDetailField, value) != true)) { 
      this.AdditionalDetailField = value; 
      this.RaisePropertyChanged("AdditionalDetail"); 
     } 
    } 
} 

因此，你需要初始化它首先

purchaseOnHoldSetRequest.UserName = "username"; 
    purchaseOnHoldSetRequest.Password = "password"; 
    purchaseOnHoldSetRequest.SystemToken = "systemtoken"; 
    purchaseOnHoldSetRequest.AgreementReference = customerAgreementNumberComboBox.Text; 

purchaseOnHoldSetRequest.AdditionalDetail = new AdditionalDetail[3]; // here 

，然后访问它同样你正在做

purchaseOnHoldSetRequest.AdditionalDetail[0] = new AdditionalDetail(); 
    purchaseOnHoldSetRequest.AdditionalDetail[0].Description = "1";